Antecedence (8)
I believe the answer is:
priority
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">antecedence</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for priority that I've seen before include "Matter of greatest importance" , "preferential treatment" , "Right to go before others" , "Status establishing relative importance or urgency" , "the most important thing" .)